1 ANSWERS

Listeners may have a hard time remembering or figuring out what "it," "they," or "this" refers to. Be specific by using a key noun instead of unclear pronouns. Some related examples are given below for your better understanding.
Pronoun problem:
The U.S. government has failed to protect us from the scourge of so-called reality television, which exploits s*x, violence, and petty conflict, and calls it human nature. This cannot continue.
Why the last sentence is unclear:
"This" what? The government's failure, Reality TV, Human nature?
More specific:
The U.S. government has failed to protect us from the scourge of so-called reality television, which exploits s*x, violence, and petty conflict, and calls it human nature. This failure cannot continue.